3.Wang, H.-X.; Fang, H.; Yu, X.-Y.; Wang, K. Development of natural gas vehicles in China: An assessment of enabling factors and barriers, Energy Policy, 2015, 85, 80-93. (SSCI) Zhang, J.-F.; Fang, H.; Wang, H.-X.*; Jia, M.-S.; Wu, J.-J.; Fang, S.-R. Energy efficiency of airlines and its influencing factors: A comparison between China and the United States. Resources, Conservation and Recycling, 2017, 125, 1-8. ( SCI)
